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- W2077642857 abstract "Abstract Reorientational and angular momentum correlation times, which characterise the rotational motion of molecules, have been determined from 2H and 31P spin-lattice relaxation time measurements for PH3 and PD3 in their plastic crystalline and liquid phases. The experimental values are compared with the predictions of the classical extended rotational diffusion model: they are shown to be inconsistent with the J-diffusion limit which has recently been successful in accounting for the rotational behaviour of a variety of small spherical and symmetric top molecules in liquids. The M-diffusion limit provides a better description in the case of liquid phosphine. In going from the liquid to the plastic crystalline phase, the reorientational correlation time decreases discontinuously at the melting point and the apparent activation energy decreases from 2.5 to 1.3 kJ mol−1; in contrast, there is no discontinuity in the angular momentum correlation time." @default.
- W2077642857 created "2016-06-24" @default.
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- W2077642857 date "1975-04-01" @default.
- W2077642857 modified "2023-09-24" @default.
- W2077642857 title "Nuclear spin relaxation studies of reorientation of PH3 and PD3 molecules in the liquid and plastic crystalline phases" @default.
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- W2077642857 doi "https://doi.org/10.1016/0009-2614(75)85183-9" @default.
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